I think ICO started to increase day after day and people started to trust it,The future will goes to ICO, maybe because the low price or the new features which it provides.
So ICOs were marred by the defeciency caused by different projects and also the incompetency of the team members and also the bridge in communication between the project marketing team and the community of supporters and also the scam projects that shutdowwn their platforms without refunding investors money and also the challenges encountered by projects in their vairous regions and government and enlistments. These contributively saw the ddemise of ICOs and the ushering in of IEO,STO anf the others.